Home / 18,939.10-28,408.64-5,791.47

Finding the Fourth Proportional to 18,939.10, 28,408.64 and 5,791.47

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Solution

The fourth proportional to 18,939.10, 28,408.64 and 5,791.47 is: 8,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.10 : 28,408.64 = 5,791.47 : x
  2. Step 2: Convert to fraction form
    18,939.10/28,408.64 = 5,791.47/x
  3. Step 3: Cross multiply
    18,939.10x = 28,408.64 × 5,791.47
  4. Step 4: Simplify right side
    18,939.10x = 164,527,786.30
  5. Step 5: Solve for x
    x = 164,527,786.30/18,939.10
  6. Step 6: Final answer
    x = 8,687.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.